Data for “Syn-eruptive hydration of volcanic ash records pyroclast-water interaction in explosive eruptions”

Syn-eruptive hydration of volcanic ash records pyroclast-water interaction in explosive eruptions
Authors: Michael R. Hudak*(1), Ilya N. Bindeman(1), Matthew W. Loewen(2), and Thomas Giachetti(1)
Affiliations: (1)Department of Earth Sciences, University of Oregon, 1272 Cascade Hall, Eugene, OR, 97403. (2)Alaska Volcano Observatory, U.S. Geological Survey, 4230 University Drive, Suite 100, Anchorage, AK 99508. 
*Corresponding author, mike.r.hudak@gmail.com

Description: These data correspond to the article “Syn-eruptive hydration of volcanic ash records pyroclast-water interaction in explosive eruptions” by Hudak et al. submitted to Geophysical Research Letters. Table 1 includes the mean bulk ash H2O and δD and corrected glass H2O with 1 s.d. for each ash sample from the 2009 eruption of Redoubt Volcano, AK. Table 2 includes each individual analysis of H2O and δD. Table 3 records the H2O and δD of hornblende separates.

Data files:
Hudak_et_al_Table_1.csv
Table S1. Mean bulk H2O and δD results for Redoubt tephra. Tephra occurs as 3 types: wm = weakly magnetic separates, nm = nonmagnetic separates, and bulk tephra. The preferred crystallinity-corrected glass H2O use the modal crystallinity of 44% from Coombs et al. (2013) in Event 5 and 6 pumice and scoria. The range of values uses crystallinities of 34-67% calculated from K2O in glass and whole rock geochemical analyses.
Hudak_et_al_Table_2.csv
Table S2. Individual bulk H2O and δD results for Redoubt tephra. Tephra occurs as 3 types: wm = weakly magnetic separates, nm = nonmagnetic separates, and bulk tephra.
Hudak_et_al_Table_3.csv
Table S3. Mean bulk H2O, corrected glass H2O, and δD results calculated by combining weakly magnetic and nonmagnetic splits of Redoubt ash. These data are used for Figure 3. 
Hudak_et_al_Table_4.csv
Table S4. H2O and δD results from hornblende separates from Redoubt tephra. Some separates were rinsed with HF for 4-5 mins to remove breakdown rims or coatings of glass on crystal surfaces.
Citation for data files: Coombs, M. L., Sisson, T. W., Bleick, H. A., Henton, S. M., Nye, C. J., Payne, A. L., ... & Bull, K. F. (2013). Andesites of the 2009 eruption of Redoubt Volcano, Alaska. Journal of Volcanology and Geothermal Research, 259, 349-372.

Date of data collection: 2019-07-22 to 2020-10-13
Sample locations and information are given in Table A1 in: Wallace, K.L., Schaefer, J.R., and Coombs, M.L. (2013). Character, mass, distribution, and origin of tephra-fall deposits from the 2009 eruption of Redoubt Volcano, Alaska - Highlighting the significance of particle aggregation. Journal of Volcanology and Geothermal Research, 259, 145-169, doi:10.1016/j.jvolgeores.2012.09.015

Data collection methods are described in: Martin, E., Bindeman, I., Balan, E., Palandri, J., Seligman, A., & Villemant, B. (2017). Hydrogen isotope determination by TC/EA technique in application to volcanic glass as a window into secondary hydration. Journal of Volcanology and Geothermal Research, 348, 49-61, doi:10.1016/j.jvolgeores.2017.10.013

